Funny. I always thought that the fable of The Fox and the Grapes was meant to show that "it is easy to despise what you cannot get" is a little on the petty and foolish side. (Though I could be wrong.)
So why do so many people used that method to try and comfort others? "That's OK. You can do much better anyway." WTF? (I wonder if anyone told AL Gore that after the election.) Not only does that sound a little childish, but doesn't it send a little message of "You were wrong to want that in the first place."?
And what if they really can't do much better? You have 2.0 GPA and didn't get into Harvard? That's ok, you can do much better anyway. You have no skills and the personality of an oyster and didn't land that dream job? That's ok, you can do much better anyway. Bah! Ridiculous. If you feel the need to comfort someone, at least have the respect to not lie to them.